#910 implement import of snmpwalk and more robust snapshot handling (#1086)

* initial work

* initial work

* initial work

* some fixes for time and Layer3 weird spec

* store again the snapshot after update for specific

* resolve the enums

* monkeypatch SNMP::translateObj to avoid hardware exception on macOS

* only save cache to db in the late phase worker

* no need to check for cache on transport, can just go ahead and try

* use database only for oidmap instead of netdisco-mibs

* rewrite device snapshot to gather loaded mib leafs only

* remove old walker code from snapshot worker

* allow snmp browser to work without snapshot

* only store snapshot leafs which the device responded on

* refactor to separate snapshot work from snmp transport work

* refactor to separate snapshot work from snmp transport work

* allow typeahead on MIB qualified leafs

* fixes for snmpwalk input after previous refactor

* add the extra stuff SNMP::Info device class uses into snapshot

* better width for snmp search box

* fix css for snmp options

* add spinner while snmp loading

* add spinner while snmp loading

* add spinner while snmp loading

* support SNMP::Info device class or named MIBs as extra on snapshot

* add final tidy and bug fix

lib/App/Netdisco/Configuration.pm

@@ -19,6 +19,21 @@ BEGIN {
   }
 }
 
+BEGIN {
+  no warnings 'redefine';
+  use SNMP;
+
+  # hardware exception on macOS at least when translateObj
+  # gets something like '.0.0' passed as arg
+
+  my $orig_translate = *SNMP::translateObj{'CODE'};
+  *SNMP::translateObj = sub {
+    my $arg = $_[0];
+    return undef unless defined $arg and $arg !~ m/^[.0]+$/;
+    return $orig_translate->(@_);
+  };
+}
+
 # set up database schema config from simple config vars
 if (ref {} eq ref setting('database')) {
     # override from env for docker